perennialN. America Native

Brown-eyed Susan

Rudbeckia triloba

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

36 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8

Water

Moderate

Humidity

Average

Lifespan

Biennial or short-lived perennial

Native To

North America

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

A resilient, biennial or short-lived perennial wildflower known for its unique three-lobed leaves and masses of small, vibrant yellow flowers with dark brown centers. Rudbeckia triloba has a bushy habit and is often used in naturalistic plantings.

Uses & Benefits:

Bright yellow flowers attract pollinators, adding cheerful color to gardens.

Deadheading prolongs blooming and maintains plant health.

Supports bees and butterflies, promoting biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into moist soil in early spring for best germination.
Water regularly to keep soil evenly moist during growing season.
Thin seedlings to 12 inches apart once established for airflow.
Apply a balanced fertilizer in spring to promote healthy growth.
Deadhead spent flowers to encourage more blooms and extend flowering period.
Divide clumps every 3 years in early spring or fall to rejuvenate.

Pro Tip

Plant in well-drained soil with full sun for vibrant blooms and healthy growth.

Keep It Thriving

Care Guide

Do

Water deeply once a week during dry spells 🌱
Deadhead regularly to prolong flowering
Apply organic compost annually for rich soil

Don't

Avoid overwatering to prevent root rot ❌
Don’t forget to mulch to retain moisture and suppress weeds
Refrain from fertilizing in late fall to prevent unnecessary growth

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Harvest
Plant
Propagate
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Sunny perennial border with vibrant yellow flowersWildflower meadow for ecological benefitsPollinator-friendly garden with nectar-rich blooms

Companion Plants

Echinacea Liatris Russian sage Sedum Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Brown-eyed Susan questions

What zones can Brown-eyed Susan grow in?

Brown-eyed Susan is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Brown-eyed Susan deer resistant?

Yes — Brown-eyed Susan is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Brown-eyed Susan bloom?

Brown-eyed Susan typically blooms in mid-summer to early fall through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Brown-eyed Susan need full sun?

Brown-eyed Susan does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Brown-eyed Susan drought tolerant?

Yes — once established (usually after the first full season), Brown-eyed Susan handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.